Lens barrel

A lens barrel comprising:

• a first main shaft and a first sub-shaft that are disposed in parallel to each other with an optical axis interposed therebetween;
• a second main shaft and a second sub-shaft that are disposed in parallel to each other with the optical axis interposed therebetween;
• a first lens frame that includes a first main guide portion sliding along the first main shaft and a first sub-guide portion sliding along the first sub-shaft;
• a second lens frame that includes a second main guide portion sliding along the second main shaft and a second sub-guide portion sliding along the second sub-shaft;
• a first drive unit that includes a plurality of first drive magnets and drives the first lens frame;
• a second drive unit that includes a plurality of second drive magnets and drives the second lens frame;
• a first position detection unit that detects a position of a first position detection magnet provided on the first lens frame to detect a position of the first lens frame;
• and
• a second position detection unit that detects a position of a second position detection magnet provided on the second lens frame to detect a position of the second lens frame,
• wherein the first main shaft and the first sub-shaft are disposed on a straight line passing through the second main shaft and the second sub-shaft and are disposed on a radially inner side than the second main shaft and the second sub-shaft in a cross section orthogonal to the optical axis,
• the first main shaft and the second main shaft are disposed so that at least parts of the first main shaft and the second main shaft overlap each other in a direction of the optical axis,
• the first position detection unit and the second position detection unit are disposed on the straight line passing through the second main shaft and the second sub-shaft in the cross section orthogonal to the optical axis, and
• the plurality of first drive magnets and the plurality of second drive magnets are arranged symmetrically with respect to the straight line passing through the second main shaft and the second sub-shaft in the cross section orthogonal to the optical axis.